Finding the Fourth Proportional to 12,448.88, 17,172.78 and 7,967.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,448.88 : 17,172.78 = 7,967.81 : x
2. Step 2: Convert to fraction form
   12,448.88/17,172.78 = 7,967.81/x
3. Step 3: Cross multiply
   12,448.88x = 17,172.78 × 7,967.81
4. Step 4: Simplify right side
   12,448.88x = 136,829,491.14
5. Step 5: Solve for x
   x = 136,829,491.14/12,448.88
6. Step 6: Final answer
   x = 10,991.31